<template>
    <view class="container">
        <view class="h">
            <view :class="'item ' + (status == 0 ? 'active' : '')" @tap="switchTab" data-index="0">
                <view class="txt">未使用</view>
            </view>
            <view :class="'item ' + (status == 1 ? 'active' : '')" @tap="switchTab" data-index="1">
                <view class="txt">已使用</view>
            </view>
            <view :class="'item ' + (status == 2 ? 'active' : '')" @tap="switchTab" data-index="2">
                <view class="txt">已过期</view>
            </view>
        </view>

        <view class="b">
            <view class="coupon-form" v-if="status == 0">
                <view class="input-box">
                    <input class="coupon-sn" placeholder="请输入优惠码" :value="code" @input="bindExchange" />
                    <van-icon name="close" class="clear-icon" v-if="code.length > 0" @tap.native.stop.prevent="clearExchange" />
                </view>
                <view class="add-btn" @tap="goExchange">兑换</view>
            </view>

            <view class="help" v-if="status == 0">
                <van-icon name="question-o" />
                使用说明
            </view>

            <scroll-view class="coupon-list" :scroll-y="true" :scroll-top="scrollTop">
                <view :class="'item ' + (status == 0 ? 'active' : '')" v-for="(item, index) in couponList" :key="item.id">
                    <view class="tag">{{ item.tag }}</view>

                    <view class="content">
                        <view class="left">
                            <view class="discount">{{ item.discount }}元</view>
                            <view class="min">满{{ item.min }}元使用</view>
                        </view>
                        <view class="right">
                            <view class="name">{{ item.name }}</view>
                            <view class="time">有效期：{{ item.startTime }} - {{ item.endTime }}</view>
                        </view>
                    </view>

                    <view class="condition">
                        <text class="txt">{{ item.desc }}</text>
                        <image :src="item.pic" class="icon"></image>
                    </view>
                </view>

                <view class="page" v-if="showPage">
                    <view :class="'prev ' + (page <= 1 ? 'disabled' : '')" @tap="prevPage">上一页</view>
                    <view :class="'next ' + (count / size < page ? 'disabled' : '')" @tap="nextPage">下一页</view>
                </view>
            </scroll-view>
        </view>
    </view>
</template>

<script>
var util = require('../../../utils/util.js');

var api = require('../../../config/api.js');

var app = getApp();
export default {
    data() {
        return {
            couponList: [],

            code: {
                length: 0
            },

            status: 0,
            page: 1,
            limit: 10,
            count: 0,
            scrollTop: 0,
            showPage: false,
            size: 0
        };
    }
    /**
     * 生命周期函数--监听页面加载
     */,
    onLoad: function (options) {
        this.getCouponList();
    },
    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {},
    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {},
    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {},
    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {},
    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh() {
        uni.showNavigationBarLoading(); //在标题栏中显示加载

        this.getCouponList();
        uni.hideNavigationBarLoading(); //完成停止加载

        uni.stopPullDownRefresh(); //停止下拉刷新
    },
    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {},
    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {},
    methods: {
        getCouponList: function () {
            let that = this;
            that.setData({
                scrollTop: 0,
                showPage: false,
                couponList: []
            });
            util.request(api.CouponMyList, {
                status: that.status,
                page: that.page,
                limit: that.limit
            }).then(function (res) {
                if (res.errno === 0) {
                    that.setData({
                        scrollTop: 0,
                        couponList: res.data.list,
                        showPage: res.data.total > that.limit,
                        count: res.data.total
                    });
                }
            });
        },

        bindExchange: function (e) {
            this.setData({
                code: e.detail.value
            });
        },

        clearExchange: function () {
            this.setData({
                code: ''
            });
        },

        goExchange: function () {
            if (this.code.length === 0) {
                util.showErrorToast('请输入兑换码');
                return;
            }

            let that = this;
            util.request(
                api.CouponExchange,
                {
                    code: that.code
                },
                'POST'
            ).then(function (res) {
                if (res.errno === 0) {
                    that.getCouponList();
                    that.clearExchange();
                    uni.showToast({
                        title: '领取成功',
                        duration: 2000
                    });
                } else {
                    util.showErrorToast(res.errmsg);
                }
            });
        },

        nextPage: function (event) {
            var that = this;

            if (this.page > that.count / that.limit) {
                return true;
            }

            that.setData({
                page: that.page + 1
            });
            this.getCouponList();
        },

        prevPage: function (event) {
            if (this.page <= 1) {
                return false;
            }

            var that = this;
            that.setData({
                page: that.page - 1
            });
            this.getCouponList();
        },

        switchTab: function (e) {
            this.setData({
                couponList: [],
                status: e.currentTarget.dataset.index,
                page: 1,
                limit: 10,
                count: 0,
                scrollTop: 0,
                showPage: false
            });
            this.getCouponList();
        }
    }
};
</script>
<style>
@import './couponList.css';
</style>
